ASSESSMENT OF SSI ON THE LONGITUDINAL SEISMIC RESPONSE OF SHORT SPAN BRIDGES

Current practice usually neglects the effects of soil-structure interaction (SSI) in the seismic analysis and design of bridges. This work attempts to assess the significance of SSI on the seismic response of short span bridges. The focus is placed on pier behaviour, since piers together with the abutments are the most critical elements in securing the integrity of bridge superstructure during earthquakes. The study is based on a simple representation of a soil-bridge pier system, yet one able to capture the effects of the most significant physical parameters. It has been found that SSI greatly affects the dynamic behaviour of bridge piers leading to more flexible systems, increased damping and larger total displacements. Besides a thorough investigation of the relative significance of various physical parameters of the system response, an easy-to-use approach that can be incorporated for a preliminary design of bridges concurrent with the AASHTO specifications is presented. The study concludes that safer and more economical bridge designs can be obtained by properly accounting for SSI. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Butterworth Scientific Limited

    Journals Division, P.O. Box 63, Westbury House, Bury
    Guildford, Surrey  England  GU2 5BH

    Betterworth Heineman Limited

    P.O. Box 63, Westbury House, Bury Street
    Guildford, Surrey,   England 
  • Authors:
    • SPYRAKOS, C C
  • Publication Date: 1990-12

Language

  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00623931
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jul 31 1992 12:00AM